void test_GetData()
{
    GraphLayer gl = Project.GraphPages(-1).Layers(-1);
    if(!gl)
        return;
    
    int nNumPoints = 2;
    
    GetGraphPoints sp;
    sp.SetFollowData(true, -1);  // not following any data plot
    sp.GetPoints(nNumPoints, gl);  // select two points from graph layer
    
    vector vx, vy;
    vector<int> vnIndices;
    vector<int> vnDataPlotIndices;
    sp.GetData(vx, vy, vnIndices, vnDataPlotIndices);  // get the selected data
    
    for(int iIndex=0; iIndex<vnIndices.GetSize(); iIndex++)
    {
    	out_str("The result of GetPoints:");
    	
    	DataPlot dp = gl.DataPlots(vnDataPlotIndices[iIndex]);  // get the plot
    	if(!dp)
    		continue;
    	
    	DataRange dr;
    	dp.GetDataRange(dr);  // get data range from plot
    	
    	string strBook;
    	string strSheet;
    	dr.GetBookSheet(strBook, strSheet, 0);  // get book name and sheet name
    	
    	printf("Point %d: X=%f, Y=%f, Index=%d, Book=%s, Sheet=%s\n", iIndex+1, vx[iIndex], vy[iIndex], vnIndices[iIndex], strBook, strSheet);
    }
}